Stegosaurus Second Brain?

3D Model

This Stegosaurus vertebrae, located over it’s hips, features an enlarged area along the neural canal. In 1881 Palentologist O. C. Marsh suggested “a posterior braincase.” This expansion also occurs in the largest sauropod dinosaurs. Paleontologist Matt Wedel suggests it is a energy-rich glycogen body that is present in birds. While the purpose for this feature is not known, it is certain that stegosaurs and sauropods didn’t have a second brain.

This speciman (FHPR 1192) is at the Utah Field House of Natural History State Park Museum, Vernal, Utah.